Merging Laurent's WX branch, reviewed by Gael. The next commit will fix line-ending problems, before pushing to Launchpad.

Merging with upstream trunk

Fix https://bugs.launchpad.net/ipython/+bug/284660 Since we now require python 2.4, I applied a simpler version of the patch mentioned there, simply using the set() builtin everywhere.

Fix https://bugs.launchpad.net/ipython/+bug/239054 - Made a more robust reset method to fully flush internal state and restore the system to a clean state. We'll need to see later if %reset should just call this. For now it's used to release resources.

Close https://bugs.launchpad.net/ipython/+bug/341726 Apply patch submitted by Alexander Clausen <alex-AT-gc-web.de>. Fixes incorrect bug reporting URL for IPython and stale SVN references.

Minor formatting cleanups, remove more svn keyword marks

Fix bug: https://bugs.launchpad.net/ipython/+bug/269966 This fixes a long-standing and serious problem with long-running IPython sessions. Finally! Many thanks to John D. Hunter and Sameer D'Costa for the feedback, especially for Sameer's patch that finally put me on the right track for a clean solution.

Fixed errors in testcases specific to py2exe after Fernando's patch

Updated dev doc guide for sphinx/numpy doc standard instead of the outdated epydoc information.

Remove svn-style $Id marks from docstrings and Release imports. The Id marks show up as junk in the API docs (and they were outdated anyway, since we now use bzr). The Release imports were in there for pulling author/license information for epydoc, but now with sphinx they aren't necessary, and they just are extra startup work.